code: def __init__(self, child_work: LightningWork):
      super().__init__()
      self.child_work = child_work
  
file_path: pytorch-lightning/docs/source-app/code_samples/quickstart/app_03.py
imports: from time import sleep
  from lightning.app import LightningWork, LightningFlow, LightningApp
label_desc: Use image node_id 1 to create a new RootFlow object from inherited base classes: LightningFlow with example: obj = RootFlow(child_work)